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    Bi

    Bismuth

    Post Transition

    Atomic Number: 83 • Atomic Mass: 208.9800 u • Period: 6 • Group: 15

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³
    Phase: Solid
    Electronegativity: 2.02
    Lead (Pb)Polonium (Po)
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    Physical & Chemical Properties

    Physical Properties

    • •Pinkish-white metal
    • •Brittle
    • •Expands when solidifying
    Melting Point

    544.7 K (271.55 °C, 520.79 °F)

    Boiling Point

    1837 K (1563.85 °C, 2846.93 °F)

    Density

    9.78 g/cm³

    Electronegativity

    2.02 (Pauling scale)

    Chemical Properties

    • •Least reactive of heavy metals
    • •Forms compounds mainly in +3 oxidation state
    • •Non-toxic

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³

    Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.